./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3dfcb4860b3021904fb2e25e7c2a428c9bcb0d82c2290cad723458395a0647ea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:42:36,356 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:42:36,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 13:42:36,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:42:36,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:42:36,503 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:42:36,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:42:36,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:42:36,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:42:36,507 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:42:36,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:42:36,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:42:36,508 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:42:36,508 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:42:36,509 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:42:36,509 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:42:36,510 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:42:36,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:42:36,511 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:42:36,511 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:42:36,511 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 13:42:36,511 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 13:42:36,511 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 13:42:36,512 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:42:36,512 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 13:42:36,512 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:42:36,512 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 13:42:36,512 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:42:36,512 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:42:36,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:42:36,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:42:36,513 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:42:36,513 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:42:36,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:42:36,514 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:42:36,515 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:42:36,515 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:42:36,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:42:36,515 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:42:36,515 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:42:36,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:42:36,516 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:42:36,516 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dfcb4860b3021904fb2e25e7c2a428c9bcb0d82c2290cad723458395a0647ea [2024-11-13 13:42:36,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:42:36,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:42:36,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:42:36,953 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:42:36,953 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:42:36,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c Unable to find full path for "g++" [2024-11-13 13:42:39,268 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:42:39,727 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:42:39,731 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c [2024-11-13 13:42:39,746 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/data/8966bb83f/d604b08d28e14cafaa8676b673b3a086/FLAGe636b272c [2024-11-13 13:42:39,847 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/data/8966bb83f/d604b08d28e14cafaa8676b673b3a086 [2024-11-13 13:42:39,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:42:39,852 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:42:39,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:42:39,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:42:39,861 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:42:39,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:42:39" (1/1) ... [2024-11-13 13:42:39,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1fb782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:39, skipping insertion in model container [2024-11-13 13:42:39,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:42:39" (1/1) ... [2024-11-13 13:42:39,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:42:40,134 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 13:42:40,159 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 13:42:40,166 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 13:42:40,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:42:40,190 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:42:40,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:42:40,258 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:42:40,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40 WrapperNode [2024-11-13 13:42:40,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:42:40,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:42:40,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:42:40,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:42:40,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,329 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 29, calls inlined = 35, statements flattened = 398 [2024-11-13 13:42:40,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:42:40,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:42:40,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:42:40,331 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:42:40,341 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,347 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,391 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 3, 3, 16]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 4]. [2024-11-13 13:42:40,395 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,429 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,444 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:42:40,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:42:40,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:42:40,469 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:42:40,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (1/1) ... [2024-11-13 13:42:40,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:42:40,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:42:40,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:42:40,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:42:40,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:42:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 13:42:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 13:42:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 13:42:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-13 13:42:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 13:42:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 13:42:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 13:42:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-13 13:42:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 13:42:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 13:42:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 13:42:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-13 13:42:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 13:42:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 13:42:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 13:42:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-13 13:42:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:42:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:42:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:42:40,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:42:40,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 13:42:40,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 13:42:40,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:42:40,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 13:42:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 13:42:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-13 13:42:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 13:42:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 13:42:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:42:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:42:40,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:42:40,600 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 13:42:40,829 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:42:40,832 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:42:42,014 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:42:42,014 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:42:43,019 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:42:43,019 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-13 13:42:43,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:42:43 BoogieIcfgContainer [2024-11-13 13:42:43,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:42:43,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:42:43,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:42:43,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:42:43,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:42:39" (1/3) ... [2024-11-13 13:42:43,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c5cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:42:43, skipping insertion in model container [2024-11-13 13:42:43,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:42:40" (2/3) ... [2024-11-13 13:42:43,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c5cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:42:43, skipping insertion in model container [2024-11-13 13:42:43,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:42:43" (3/3) ... [2024-11-13 13:42:43,040 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr.c [2024-11-13 13:42:43,061 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:42:43,063 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-prod-cons-eq.wvr.c that has 4 procedures, 97 locations, 1 initial locations, 9 loop locations, and 46 error locations. [2024-11-13 13:42:43,064 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:42:43,237 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 13:42:43,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 106 transitions, 233 flow [2024-11-13 13:42:43,429 INFO L124 PetriNetUnfolderBase]: 10/103 cut-off events. [2024-11-13 13:42:43,435 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 13:42:43,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 10/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 320 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2024-11-13 13:42:43,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 106 transitions, 233 flow [2024-11-13 13:42:43,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 102 transitions, 222 flow [2024-11-13 13:42:43,470 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:42:43,495 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2dde6520, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:42:43,498 INFO L334 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2024-11-13 13:42:43,506 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:42:43,506 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 13:42:43,507 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:42:43,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:42:43,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:42:43,508 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:42:43,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:42:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1319531, now seen corresponding path program 1 times [2024-11-13 13:42:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:42:43,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775721915] [2024-11-13 13:42:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:42:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:42:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:42:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:42:43,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:42:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775721915] [2024-11-13 13:42:43,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775721915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:42:43,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:42:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 13:42:43,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105722585] [2024-11-13 13:42:43,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:42:43,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:42:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:42:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:42:44,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:42:44,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:42:44,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:44,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:42:44,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:42:44,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:42:47,100 INFO L124 PetriNetUnfolderBase]: 5713/11550 cut-off events. [2024-11-13 13:42:47,100 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-13 13:42:47,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19585 conditions, 11550 events. 5713/11550 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 114615 event pairs, 4115 based on Foata normal form. 1/6152 useless extension candidates. Maximal degree in co-relation 18897. Up to 7695 conditions per place. [2024-11-13 13:42:47,239 INFO L140 encePairwiseOnDemand]: 93/106 looper letters, 52 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2024-11-13 13:42:47,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 314 flow [2024-11-13 13:42:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:42:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:42:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-13 13:42:47,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-11-13 13:42:47,261 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 222 flow. Second operand 3 states and 185 transitions. [2024-11-13 13:42:47,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 314 flow [2024-11-13 13:42:47,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:42:47,280 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 198 flow [2024-11-13 13:42:47,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-11-13 13:42:47,289 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -14 predicate places. [2024-11-13 13:42:47,289 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 198 flow [2024-11-13 13:42:47,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:47,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:42:47,290 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:42:47,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:42:47,291 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:42:47,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:42:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1319532, now seen corresponding path program 1 times [2024-11-13 13:42:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:42:47,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763024228] [2024-11-13 13:42:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:42:47,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:42:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:42:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:42:47,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:42:47,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763024228] [2024-11-13 13:42:47,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763024228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:42:47,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:42:47,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:42:47,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569593993] [2024-11-13 13:42:47,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:42:47,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:42:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:42:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:42:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:42:48,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:42:48,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:48,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:42:48,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:42:48,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:42:50,249 INFO L124 PetriNetUnfolderBase]: 5714/11553 cut-off events. [2024-11-13 13:42:50,250 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-13 13:42:50,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19394 conditions, 11553 events. 5714/11553 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 114605 event pairs, 4115 based on Foata normal form. 0/6152 useless extension candidates. Maximal degree in co-relation 19341. Up to 7712 conditions per place. [2024-11-13 13:42:50,333 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 59 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-13 13:42:50,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 330 flow [2024-11-13 13:42:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:42:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:42:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2024-11-13 13:42:50,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-13 13:42:50,340 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 198 flow. Second operand 4 states and 224 transitions. [2024-11-13 13:42:50,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 330 flow [2024-11-13 13:42:50,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:42:50,346 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 217 flow [2024-11-13 13:42:50,347 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-13 13:42:50,349 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -11 predicate places. [2024-11-13 13:42:50,349 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 217 flow [2024-11-13 13:42:50,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:50,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:42:50,351 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 13:42:50,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:42:50,352 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:42:50,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:42:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 40907488, now seen corresponding path program 1 times [2024-11-13 13:42:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:42:50,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762260165] [2024-11-13 13:42:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:42:50,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:42:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:42:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:42:50,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:42:50,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762260165] [2024-11-13 13:42:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762260165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:42:50,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:42:50,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:42:50,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929240013] [2024-11-13 13:42:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:42:50,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:42:50,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:42:50,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:42:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:42:51,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:42:51,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:51,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:42:51,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:42:51,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:42:53,314 INFO L124 PetriNetUnfolderBase]: 5715/11556 cut-off events. [2024-11-13 13:42:53,315 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-13 13:42:53,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 11556 events. 5715/11556 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114690 event pairs, 4115 based on Foata normal form. 0/6152 useless extension candidates. Maximal degree in co-relation 19384. Up to 7711 conditions per place. [2024-11-13 13:42:53,422 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 59 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2024-11-13 13:42:53,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 355 flow [2024-11-13 13:42:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:42:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:42:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-13 13:42:53,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-11-13 13:42:53,425 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 217 flow. Second operand 5 states and 267 transitions. [2024-11-13 13:42:53,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 355 flow [2024-11-13 13:42:53,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:42:53,433 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 251 flow [2024-11-13 13:42:53,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-11-13 13:42:53,434 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -6 predicate places. [2024-11-13 13:42:53,436 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 251 flow [2024-11-13 13:42:53,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:53,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:42:53,437 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 13:42:53,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 13:42:53,437 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:42:53,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:42:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1268133663, now seen corresponding path program 1 times [2024-11-13 13:42:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:42:53,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47231664] [2024-11-13 13:42:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:42:53,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:42:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:42:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:42:53,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:42:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47231664] [2024-11-13 13:42:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47231664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:42:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:42:53,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:42:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672020179] [2024-11-13 13:42:53,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:42:53,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:42:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:42:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:42:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:42:54,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:42:54,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:54,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:42:54,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:42:54,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:42:55,708 INFO L124 PetriNetUnfolderBase]: 5716/11559 cut-off events. [2024-11-13 13:42:55,708 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-13 13:42:55,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19431 conditions, 11559 events. 5716/11559 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114744 event pairs, 4115 based on Foata normal form. 0/6156 useless extension candidates. Maximal degree in co-relation 19400. Up to 7714 conditions per place. [2024-11-13 13:42:55,789 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 60 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-13 13:42:55,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 101 transitions, 395 flow [2024-11-13 13:42:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:42:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:42:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-13 13:42:55,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-11-13 13:42:55,795 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 251 flow. Second operand 5 states and 267 transitions. [2024-11-13 13:42:55,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 101 transitions, 395 flow [2024-11-13 13:42:55,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:42:55,801 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 293 flow [2024-11-13 13:42:55,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-11-13 13:42:55,803 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2024-11-13 13:42:55,803 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 293 flow [2024-11-13 13:42:55,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:55,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:42:55,804 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 13:42:55,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 13:42:55,806 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:42:55,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:42:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1268114537, now seen corresponding path program 1 times [2024-11-13 13:42:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:42:55,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739769647] [2024-11-13 13:42:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:42:55,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:42:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:42:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:42:56,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:42:56,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739769647] [2024-11-13 13:42:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739769647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:42:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408593160] [2024-11-13 13:42:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:42:56,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:42:56,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:42:56,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:42:56,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:42:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:42:56,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 13:42:56,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:42:56,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 13:42:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:42:56,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:42:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:42:56,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408593160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:42:56,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:42:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 13:42:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959082534] [2024-11-13 13:42:56,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:42:56,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 13:42:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:42:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 13:42:56,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:42:57,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:42:57,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 293 flow. Second operand has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:57,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:42:57,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:42:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:42:59,335 INFO L124 PetriNetUnfolderBase]: 5717/11561 cut-off events. [2024-11-13 13:42:59,335 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-13 13:42:59,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19459 conditions, 11561 events. 5717/11561 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114618 event pairs, 4115 based on Foata normal form. 0/6161 useless extension candidates. Maximal degree in co-relation 19415. Up to 7715 conditions per place. [2024-11-13 13:42:59,423 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 61 selfloop transitions, 10 changer transitions 0/103 dead transitions. [2024-11-13 13:42:59,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 103 transitions, 446 flow [2024-11-13 13:42:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 13:42:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 13:42:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 387 transitions. [2024-11-13 13:42:59,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4563679245283019 [2024-11-13 13:42:59,426 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 293 flow. Second operand 8 states and 387 transitions. [2024-11-13 13:42:59,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 103 transitions, 446 flow [2024-11-13 13:42:59,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 103 transitions, 439 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:42:59,430 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 317 flow [2024-11-13 13:42:59,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2024-11-13 13:42:59,431 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 3 predicate places. [2024-11-13 13:42:59,431 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 317 flow [2024-11-13 13:42:59,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:42:59,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:42:59,432 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 13:42:59,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 13:42:59,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:42:59,636 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:42:59,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:42:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash 657434150, now seen corresponding path program 1 times [2024-11-13 13:42:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:42:59,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264934715] [2024-11-13 13:42:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:42:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:42:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:00,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264934715] [2024-11-13 13:43:00,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264934715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291418271] [2024-11-13 13:43:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:00,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:00,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:00,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:43:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:00,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:43:00,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:00,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 13:43:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:00,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291418271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:00,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 13:43:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893918650] [2024-11-13 13:43:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:00,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:43:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:43:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:43:01,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:43:01,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 317 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:01,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:01,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:43:01,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:03,898 INFO L124 PetriNetUnfolderBase]: 5718/11563 cut-off events. [2024-11-13 13:43:03,899 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-13 13:43:03,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19472 conditions, 11563 events. 5718/11563 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 115057 event pairs, 4115 based on Foata normal form. 0/6164 useless extension candidates. Maximal degree in co-relation 19421. Up to 7707 conditions per place. [2024-11-13 13:43:03,997 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 55 selfloop transitions, 18 changer transitions 0/105 dead transitions. [2024-11-13 13:43:03,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 105 transitions, 473 flow [2024-11-13 13:43:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:43:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:43:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 432 transitions. [2024-11-13 13:43:04,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-11-13 13:43:04,001 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 317 flow. Second operand 9 states and 432 transitions. [2024-11-13 13:43:04,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 105 transitions, 473 flow [2024-11-13 13:43:04,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 105 transitions, 426 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-13 13:43:04,005 INFO L231 Difference]: Finished difference. Result has 104 places, 105 transitions, 316 flow [2024-11-13 13:43:04,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=104, PETRI_TRANSITIONS=105} [2024-11-13 13:43:04,006 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2024-11-13 13:43:04,006 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 105 transitions, 316 flow [2024-11-13 13:43:04,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:04,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:04,007 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 13:43:04,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 13:43:04,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 13:43:04,212 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:04,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:04,213 INFO L85 PathProgramCache]: Analyzing trace with hash 657441556, now seen corresponding path program 1 times [2024-11-13 13:43:04,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:04,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122372147] [2024-11-13 13:43:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:04,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:04,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122372147] [2024-11-13 13:43:04,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122372147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:04,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:04,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:43:04,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331770933] [2024-11-13 13:43:04,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:04,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:43:04,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:04,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:43:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:43:04,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-13 13:43:04,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:04,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:04,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-13 13:43:04,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:05,664 INFO L124 PetriNetUnfolderBase]: 5718/11562 cut-off events. [2024-11-13 13:43:05,664 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-13 13:43:05,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19461 conditions, 11562 events. 5718/11562 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 114783 event pairs, 4115 based on Foata normal form. 0/6166 useless extension candidates. Maximal degree in co-relation 19404. Up to 7718 conditions per place. [2024-11-13 13:43:05,723 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 68 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2024-11-13 13:43:05,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 104 transitions, 456 flow [2024-11-13 13:43:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:43:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:43:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2024-11-13 13:43:05,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-11-13 13:43:05,725 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 316 flow. Second operand 3 states and 186 transitions. [2024-11-13 13:43:05,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 104 transitions, 456 flow [2024-11-13 13:43:05,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 423 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-13 13:43:05,729 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 287 flow [2024-11-13 13:43:05,729 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2024-11-13 13:43:05,730 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2024-11-13 13:43:05,730 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 287 flow [2024-11-13 13:43:05,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:05,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:05,731 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 13:43:05,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 13:43:05,731 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:05,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash 657441557, now seen corresponding path program 1 times [2024-11-13 13:43:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:05,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812793517] [2024-11-13 13:43:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:05,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:05,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812793517] [2024-11-13 13:43:05,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812793517] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:05,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:05,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:43:05,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834875067] [2024-11-13 13:43:05,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:05,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:43:05,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:43:05,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:43:05,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 13:43:05,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 104 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:05,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:05,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 13:43:05,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:07,443 INFO L124 PetriNetUnfolderBase]: 7475/15890 cut-off events. [2024-11-13 13:43:07,443 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-13 13:43:07,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26448 conditions, 15890 events. 7475/15890 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 169859 event pairs, 5726 based on Foata normal form. 237/8655 useless extension candidates. Maximal degree in co-relation 26378. Up to 7717 conditions per place. [2024-11-13 13:43:07,645 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 105 selfloop transitions, 8 changer transitions 0/146 dead transitions. [2024-11-13 13:43:07,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 146 transitions, 623 flow [2024-11-13 13:43:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:43:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:43:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 321 transitions. [2024-11-13 13:43:07,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6056603773584905 [2024-11-13 13:43:07,647 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 287 flow. Second operand 5 states and 321 transitions. [2024-11-13 13:43:07,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 146 transitions, 623 flow [2024-11-13 13:43:07,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 611 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:07,655 INFO L231 Difference]: Finished difference. Result has 104 places, 107 transitions, 326 flow [2024-11-13 13:43:07,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=104, PETRI_TRANSITIONS=107} [2024-11-13 13:43:07,657 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2024-11-13 13:43:07,657 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 107 transitions, 326 flow [2024-11-13 13:43:07,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:07,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:07,661 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 13:43:07,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 13:43:07,661 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:07,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:07,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1094217730, now seen corresponding path program 1 times [2024-11-13 13:43:07,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:07,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932541720] [2024-11-13 13:43:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:07,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:08,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932541720] [2024-11-13 13:43:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932541720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230642246] [2024-11-13 13:43:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:08,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:08,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:08,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:43:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:08,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 13:43:08,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:08,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 13:43:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:08,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:08,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230642246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:08,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:08,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 13:43:08,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139835501] [2024-11-13 13:43:08,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:08,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:43:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:43:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:43:09,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:43:09,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 107 transitions, 326 flow. Second operand has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:09,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:09,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:43:09,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:11,839 INFO L124 PetriNetUnfolderBase]: 7693/15548 cut-off events. [2024-11-13 13:43:11,839 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2024-11-13 13:43:11,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26779 conditions, 15548 events. 7693/15548 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 161949 event pairs, 5827 based on Foata normal form. 0/8158 useless extension candidates. Maximal degree in co-relation 26708. Up to 10578 conditions per place. [2024-11-13 13:43:11,926 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 54 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-11-13 13:43:11,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 106 transitions, 472 flow [2024-11-13 13:43:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:43:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:43:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 344 transitions. [2024-11-13 13:43:11,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-11-13 13:43:11,929 INFO L175 Difference]: Start difference. First operand has 104 places, 107 transitions, 326 flow. Second operand 7 states and 344 transitions. [2024-11-13 13:43:11,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 106 transitions, 472 flow [2024-11-13 13:43:11,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 106 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:43:11,932 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 360 flow [2024-11-13 13:43:11,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=360, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2024-11-13 13:43:11,933 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 6 predicate places. [2024-11-13 13:43:11,933 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 360 flow [2024-11-13 13:43:11,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:11,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:11,934 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:11,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:43:12,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:12,138 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:12,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash 434076891, now seen corresponding path program 1 times [2024-11-13 13:43:12,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:12,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742178824] [2024-11-13 13:43:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:12,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742178824] [2024-11-13 13:43:12,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742178824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608562820] [2024-11-13 13:43:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:12,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:12,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:12,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:43:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:12,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 13:43:12,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:12,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 13:43:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:12,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:12,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608562820] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:12,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:43:12,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 14 [2024-11-13 13:43:12,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932096726] [2024-11-13 13:43:12,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:12,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:43:12,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:12,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:43:12,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-13 13:43:13,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-13 13:43:13,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 360 flow. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:13,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:13,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-13 13:43:13,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:15,176 INFO L124 PetriNetUnfolderBase]: 7476/15891 cut-off events. [2024-11-13 13:43:15,176 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2024-11-13 13:43:15,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26869 conditions, 15891 events. 7476/15891 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 1203. Compared 170788 event pairs, 5726 based on Foata normal form. 0/8415 useless extension candidates. Maximal degree in co-relation 26780. Up to 7711 conditions per place. [2024-11-13 13:43:15,264 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 107 selfloop transitions, 10 changer transitions 0/148 dead transitions. [2024-11-13 13:43:15,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 706 flow [2024-11-13 13:43:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:43:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:43:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2024-11-13 13:43:15,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-13 13:43:15,267 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 360 flow. Second operand 6 states and 360 transitions. [2024-11-13 13:43:15,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 706 flow [2024-11-13 13:43:15,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 651 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-13 13:43:15,272 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 351 flow [2024-11-13 13:43:15,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2024-11-13 13:43:15,273 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 6 predicate places. [2024-11-13 13:43:15,274 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 351 flow [2024-11-13 13:43:15,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:15,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:15,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:15,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 13:43:15,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 13:43:15,476 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:15,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash 441192426, now seen corresponding path program 1 times [2024-11-13 13:43:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:15,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768403827] [2024-11-13 13:43:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:15,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:15,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768403827] [2024-11-13 13:43:15,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768403827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:15,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:15,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:43:15,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618778164] [2024-11-13 13:43:15,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:15,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:43:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:15,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:43:15,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:43:16,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:43:16,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:16,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:16,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:43:16,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:17,645 INFO L124 PetriNetUnfolderBase]: 7696/15557 cut-off events. [2024-11-13 13:43:17,646 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2024-11-13 13:43:17,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26808 conditions, 15557 events. 7696/15557 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 161820 event pairs, 5827 based on Foata normal form. 0/8164 useless extension candidates. Maximal degree in co-relation 19719. Up to 10599 conditions per place. [2024-11-13 13:43:17,739 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 72 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-11-13 13:43:17,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 517 flow [2024-11-13 13:43:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:43:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:43:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2024-11-13 13:43:17,741 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-11-13 13:43:17,741 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 351 flow. Second operand 5 states and 264 transitions. [2024-11-13 13:43:17,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 517 flow [2024-11-13 13:43:17,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 505 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:43:17,746 INFO L231 Difference]: Finished difference. Result has 111 places, 111 transitions, 379 flow [2024-11-13 13:43:17,746 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=111, PETRI_TRANSITIONS=111} [2024-11-13 13:43:17,747 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 9 predicate places. [2024-11-13 13:43:17,747 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 111 transitions, 379 flow [2024-11-13 13:43:17,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:17,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:17,748 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:17,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 13:43:17,748 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:17,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash 441192532, now seen corresponding path program 1 times [2024-11-13 13:43:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483177817] [2024-11-13 13:43:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:17,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:17,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483177817] [2024-11-13 13:43:17,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483177817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:17,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:17,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:43:17,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438423703] [2024-11-13 13:43:17,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:17,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:43:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:43:17,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:43:17,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 106 [2024-11-13 13:43:17,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 111 transitions, 379 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:17,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:17,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 106 [2024-11-13 13:43:17,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:19,421 INFO L124 PetriNetUnfolderBase]: 7634/14863 cut-off events. [2024-11-13 13:43:19,421 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-11-13 13:43:19,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26039 conditions, 14863 events. 7634/14863 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 148175 event pairs, 5872 based on Foata normal form. 0/8289 useless extension candidates. Maximal degree in co-relation 25957. Up to 10514 conditions per place. [2024-11-13 13:43:19,558 INFO L140 encePairwiseOnDemand]: 102/106 looper letters, 76 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2024-11-13 13:43:19,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 108 transitions, 531 flow [2024-11-13 13:43:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:43:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:43:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-13 13:43:19,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2024-11-13 13:43:19,560 INFO L175 Difference]: Start difference. First operand has 111 places, 111 transitions, 379 flow. Second operand 3 states and 182 transitions. [2024-11-13 13:43:19,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 108 transitions, 531 flow [2024-11-13 13:43:19,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 525 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:19,564 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 373 flow [2024-11-13 13:43:19,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=373, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2024-11-13 13:43:19,565 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 6 predicate places. [2024-11-13 13:43:19,566 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 373 flow [2024-11-13 13:43:19,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:19,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:19,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:19,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 13:43:19,566 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:19,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash 441192533, now seen corresponding path program 1 times [2024-11-13 13:43:19,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:19,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564204518] [2024-11-13 13:43:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564204518] [2024-11-13 13:43:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564204518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:19,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:43:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204606099] [2024-11-13 13:43:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:19,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:43:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:43:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:43:20,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:43:20,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:20,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:20,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:43:20,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:21,698 INFO L124 PetriNetUnfolderBase]: 7640/14883 cut-off events. [2024-11-13 13:43:21,698 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-11-13 13:43:21,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26094 conditions, 14883 events. 7640/14883 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 148311 event pairs, 5872 based on Foata normal form. 0/8305 useless extension candidates. Maximal degree in co-relation 25979. Up to 10552 conditions per place. [2024-11-13 13:43:21,790 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 80 selfloop transitions, 9 changer transitions 0/117 dead transitions. [2024-11-13 13:43:21,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 117 transitions, 585 flow [2024-11-13 13:43:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:43:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:43:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 304 transitions. [2024-11-13 13:43:21,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-11-13 13:43:21,793 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 373 flow. Second operand 6 states and 304 transitions. [2024-11-13 13:43:21,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 117 transitions, 585 flow [2024-11-13 13:43:21,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 117 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:43:21,796 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 427 flow [2024-11-13 13:43:21,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2024-11-13 13:43:21,797 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 13 predicate places. [2024-11-13 13:43:21,797 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 427 flow [2024-11-13 13:43:21,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:21,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:21,798 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:21,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 13:43:21,798 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:21,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 536109065, now seen corresponding path program 1 times [2024-11-13 13:43:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:21,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935591369] [2024-11-13 13:43:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:21,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:21,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:21,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935591369] [2024-11-13 13:43:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935591369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:21,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936188912] [2024-11-13 13:43:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:21,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:21,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:21,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:21,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:43:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:22,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 13:43:22,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:22,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936188912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:22,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:22,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 13:43:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112939914] [2024-11-13 13:43:22,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:22,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:43:22,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:43:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:43:22,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 13:43:22,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:22,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:22,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 13:43:22,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:25,137 INFO L124 PetriNetUnfolderBase]: 11885/23657 cut-off events. [2024-11-13 13:43:25,137 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2024-11-13 13:43:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41108 conditions, 23657 events. 11885/23657 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 1672. Compared 252954 event pairs, 8787 based on Foata normal form. 1/12937 useless extension candidates. Maximal degree in co-relation 40950. Up to 9401 conditions per place. [2024-11-13 13:43:25,263 INFO L140 encePairwiseOnDemand]: 92/106 looper letters, 114 selfloop transitions, 35 changer transitions 0/179 dead transitions. [2024-11-13 13:43:25,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 179 transitions, 980 flow [2024-11-13 13:43:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:43:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:43:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 602 transitions. [2024-11-13 13:43:25,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.516295025728988 [2024-11-13 13:43:25,267 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 427 flow. Second operand 11 states and 602 transitions. [2024-11-13 13:43:25,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 179 transitions, 980 flow [2024-11-13 13:43:25,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 179 transitions, 968 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:25,272 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 670 flow [2024-11-13 13:43:25,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=670, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-11-13 13:43:25,273 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 26 predicate places. [2024-11-13 13:43:25,273 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 670 flow [2024-11-13 13:43:25,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:25,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:25,274 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:25,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 13:43:25,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 13:43:25,474 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:25,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1215796101, now seen corresponding path program 1 times [2024-11-13 13:43:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804690692] [2024-11-13 13:43:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:25,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:25,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:25,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804690692] [2024-11-13 13:43:25,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804690692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:25,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774888426] [2024-11-13 13:43:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:25,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:25,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:25,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:25,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:43:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:26,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 13:43:26,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:26,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 13:43:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:26,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:26,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774888426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:26,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:26,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 13:43:26,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636425273] [2024-11-13 13:43:26,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:26,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:43:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:43:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:43:27,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 13:43:27,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 670 flow. Second operand has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:27,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:27,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 13:43:27,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:30,258 INFO L124 PetriNetUnfolderBase]: 12078/23396 cut-off events. [2024-11-13 13:43:30,258 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-11-13 13:43:30,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 23396 events. 12078/23396 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 245559 event pairs, 8876 based on Foata normal form. 6/12713 useless extension candidates. Maximal degree in co-relation 41130. Up to 16488 conditions per place. [2024-11-13 13:43:30,389 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 76 selfloop transitions, 24 changer transitions 0/129 dead transitions. [2024-11-13 13:43:30,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 129 transitions, 866 flow [2024-11-13 13:43:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:43:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:43:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 342 transitions. [2024-11-13 13:43:30,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-11-13 13:43:30,390 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 670 flow. Second operand 7 states and 342 transitions. [2024-11-13 13:43:30,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 129 transitions, 866 flow [2024-11-13 13:43:30,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 129 transitions, 857 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-13 13:43:30,397 INFO L231 Difference]: Finished difference. Result has 132 places, 129 transitions, 705 flow [2024-11-13 13:43:30,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=132, PETRI_TRANSITIONS=129} [2024-11-13 13:43:30,397 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 30 predicate places. [2024-11-13 13:43:30,397 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 129 transitions, 705 flow [2024-11-13 13:43:30,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:30,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:30,398 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:30,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 13:43:30,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 13:43:30,599 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:30,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1214547296, now seen corresponding path program 1 times [2024-11-13 13:43:30,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:30,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816690696] [2024-11-13 13:43:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:30,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:30,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:30,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816690696] [2024-11-13 13:43:30,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816690696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:30,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:30,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:43:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121890836] [2024-11-13 13:43:30,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:30,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:43:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:43:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:43:30,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 13:43:30,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 129 transitions, 705 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:30,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:30,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 13:43:30,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:33,862 INFO L124 PetriNetUnfolderBase]: 12586/24411 cut-off events. [2024-11-13 13:43:33,862 INFO L125 PetriNetUnfolderBase]: For 942/942 co-relation queries the response was YES. [2024-11-13 13:43:33,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43528 conditions, 24411 events. 12586/24411 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 1704. Compared 256014 event pairs, 9350 based on Foata normal form. 147/13641 useless extension candidates. Maximal degree in co-relation 43430. Up to 16523 conditions per place. [2024-11-13 13:43:34,040 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 170 selfloop transitions, 3 changer transitions 0/202 dead transitions. [2024-11-13 13:43:34,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 202 transitions, 1541 flow [2024-11-13 13:43:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:43:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:43:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-11-13 13:43:34,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6462264150943396 [2024-11-13 13:43:34,042 INFO L175 Difference]: Start difference. First operand has 132 places, 129 transitions, 705 flow. Second operand 4 states and 274 transitions. [2024-11-13 13:43:34,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 202 transitions, 1541 flow [2024-11-13 13:43:34,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 202 transitions, 1451 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-13 13:43:34,050 INFO L231 Difference]: Finished difference. Result has 130 places, 129 transitions, 672 flow [2024-11-13 13:43:34,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=672, PETRI_PLACES=130, PETRI_TRANSITIONS=129} [2024-11-13 13:43:34,051 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 28 predicate places. [2024-11-13 13:43:34,051 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 129 transitions, 672 flow [2024-11-13 13:43:34,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:34,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:34,052 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:34,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 13:43:34,052 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:34,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash 968134443, now seen corresponding path program 1 times [2024-11-13 13:43:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753421752] [2024-11-13 13:43:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753421752] [2024-11-13 13:43:34,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753421752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:34,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144439188] [2024-11-13 13:43:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:34,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:34,720 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:34,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:43:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:34,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:43:34,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:35,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 13:43:35,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 13:43:35,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:43:35,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 13:43:35,127 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:43:35,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 13:43:35,332 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:43:35,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 13:43:35,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2024-11-13 13:43:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:35,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:35,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:43:35,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-13 13:43:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:43:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:36,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144439188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:36,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:36,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-13 13:43:36,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793867620] [2024-11-13 13:43:36,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:36,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:43:36,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:36,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:43:36,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:43:38,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-13 13:43:38,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 129 transitions, 672 flow. Second operand has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:38,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:38,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-13 13:43:38,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:42,218 INFO L124 PetriNetUnfolderBase]: 13950/26816 cut-off events. [2024-11-13 13:43:42,219 INFO L125 PetriNetUnfolderBase]: For 2196/2196 co-relation queries the response was YES. [2024-11-13 13:43:42,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52517 conditions, 26816 events. 13950/26816 cut-off events. For 2196/2196 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 281046 event pairs, 10504 based on Foata normal form. 0/16046 useless extension candidates. Maximal degree in co-relation 52420. Up to 19198 conditions per place. [2024-11-13 13:43:42,423 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 104 selfloop transitions, 18 changer transitions 0/149 dead transitions. [2024-11-13 13:43:42,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 149 transitions, 1047 flow [2024-11-13 13:43:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:43:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:43:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 430 transitions. [2024-11-13 13:43:42,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4056603773584906 [2024-11-13 13:43:42,425 INFO L175 Difference]: Start difference. First operand has 130 places, 129 transitions, 672 flow. Second operand 10 states and 430 transitions. [2024-11-13 13:43:42,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 149 transitions, 1047 flow [2024-11-13 13:43:42,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 149 transitions, 1042 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:42,437 INFO L231 Difference]: Finished difference. Result has 136 places, 131 transitions, 712 flow [2024-11-13 13:43:42,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=712, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2024-11-13 13:43:42,438 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 34 predicate places. [2024-11-13 13:43:42,438 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 712 flow [2024-11-13 13:43:42,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:42,439 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:42,439 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:42,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:43:42,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 13:43:42,644 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:42,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash 358085126, now seen corresponding path program 1 times [2024-11-13 13:43:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:42,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654688373] [2024-11-13 13:43:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:42,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:42,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:42,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654688373] [2024-11-13 13:43:42,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654688373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:42,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:42,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:43:42,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842693648] [2024-11-13 13:43:42,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:42,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:43:42,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:43:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:43:42,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 13:43:42,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 712 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:42,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:42,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 13:43:42,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:46,250 INFO L124 PetriNetUnfolderBase]: 13119/26268 cut-off events. [2024-11-13 13:43:46,251 INFO L125 PetriNetUnfolderBase]: For 2374/2374 co-relation queries the response was YES. [2024-11-13 13:43:46,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51317 conditions, 26268 events. 13119/26268 cut-off events. For 2374/2374 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 282556 event pairs, 9742 based on Foata normal form. 226/16229 useless extension candidates. Maximal degree in co-relation 51130. Up to 17442 conditions per place. [2024-11-13 13:43:46,494 INFO L140 encePairwiseOnDemand]: 92/106 looper letters, 143 selfloop transitions, 9 changer transitions 0/180 dead transitions. [2024-11-13 13:43:46,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 180 transitions, 1289 flow [2024-11-13 13:43:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:43:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:43:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-11-13 13:43:46,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6462264150943396 [2024-11-13 13:43:46,496 INFO L175 Difference]: Start difference. First operand has 136 places, 131 transitions, 712 flow. Second operand 4 states and 274 transitions. [2024-11-13 13:43:46,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 180 transitions, 1289 flow [2024-11-13 13:43:46,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 180 transitions, 1173 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-13 13:43:46,506 INFO L231 Difference]: Finished difference. Result has 132 places, 131 transitions, 692 flow [2024-11-13 13:43:46,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=692, PETRI_PLACES=132, PETRI_TRANSITIONS=131} [2024-11-13 13:43:46,507 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 30 predicate places. [2024-11-13 13:43:46,507 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 131 transitions, 692 flow [2024-11-13 13:43:46,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:46,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:46,507 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:46,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 13:43:46,508 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:46,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1560659663, now seen corresponding path program 2 times [2024-11-13 13:43:46,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:46,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822368480] [2024-11-13 13:43:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:46,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822368480] [2024-11-13 13:43:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822368480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035204584] [2024-11-13 13:43:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:43:46,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:46,858 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:43:47,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:43:47,032 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:43:47,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 13:43:47,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:47,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 13:43:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:47,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035204584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:47,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:47,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-13 13:43:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363191426] [2024-11-13 13:43:47,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:47,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 13:43:47,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 13:43:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-13 13:43:48,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-13 13:43:48,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 131 transitions, 692 flow. Second operand has 22 states, 22 states have (on average 44.63636363636363) internal successors, (982), 22 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:48,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:48,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-13 13:43:48,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:53,847 INFO L124 PetriNetUnfolderBase]: 18861/36961 cut-off events. [2024-11-13 13:43:53,847 INFO L125 PetriNetUnfolderBase]: For 5878/5926 co-relation queries the response was YES. [2024-11-13 13:43:53,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82356 conditions, 36961 events. 18861/36961 cut-off events. For 5878/5926 co-relation queries the response was YES. Maximal size of possible extension queue 2450. Compared 405199 event pairs, 13878 based on Foata normal form. 0/22557 useless extension candidates. Maximal degree in co-relation 81978. Up to 10839 conditions per place. [2024-11-13 13:43:54,089 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 207 selfloop transitions, 23 changer transitions 0/257 dead transitions. [2024-11-13 13:43:54,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 257 transitions, 1692 flow [2024-11-13 13:43:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 13:43:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 13:43:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 735 transitions. [2024-11-13 13:43:54,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333817126269956 [2024-11-13 13:43:54,093 INFO L175 Difference]: Start difference. First operand has 132 places, 131 transitions, 692 flow. Second operand 13 states and 735 transitions. [2024-11-13 13:43:54,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 257 transitions, 1692 flow [2024-11-13 13:43:54,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 257 transitions, 1684 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:43:54,113 INFO L231 Difference]: Finished difference. Result has 146 places, 141 transitions, 837 flow [2024-11-13 13:43:54,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=837, PETRI_PLACES=146, PETRI_TRANSITIONS=141} [2024-11-13 13:43:54,113 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 44 predicate places. [2024-11-13 13:43:54,114 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 141 transitions, 837 flow [2024-11-13 13:43:54,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 44.63636363636363) internal successors, (982), 22 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:54,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:54,114 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:54,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 13:43:54,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:54,315 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 13:43:54,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash -917833785, now seen corresponding path program 1 times [2024-11-13 13:43:54,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:54,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451612255] [2024-11-13 13:43:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:55,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:55,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451612255] [2024-11-13 13:43:55,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451612255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:55,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515780414] [2024-11-13 13:43:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:55,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:55,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:55,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:55,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2096fec-55d9-484a-945b-70c133347869/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:43:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:55,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 13:43:55,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:55,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 13:43:55,409 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 13:43:55,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-13 13:43:55,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 13:43:55,438 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 13:43:55,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-13 13:43:55,456 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 13:43:55,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 13:43:55,580 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 13:43:55,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2024-11-13 13:43:55,603 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2024-11-13 13:43:55,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2024-11-13 13:43:55,702 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 13:43:55,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2024-11-13 13:43:55,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:43:55,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-13 13:43:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:55,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:44:00,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2662 treesize of output 2644 [2024-11-13 13:44:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:44:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515780414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:44:04,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:44:04,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-13 13:44:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599577112] [2024-11-13 13:44:04,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:44:04,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 13:44:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:44:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 13:44:04,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=279, Unknown=1, NotChecked=0, Total=342 [2024-11-13 13:44:08,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:13,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:17,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:20,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:24,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:29,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:33,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:38,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:42,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:46,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:51,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:55,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:44:59,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:45:02,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:45:06,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:45:11,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:45:12,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 106 [2024-11-13 13:45:12,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 141 transitions, 837 flow. Second operand has 19 states, 19 states have (on average 14.894736842105264) internal successors, (283), 19 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:45:12,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:45:12,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 106 [2024-11-13 13:45:12,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:45:17,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:45:21,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]